You need to login to do this. The Sonic 3 and knuckles game genie debug is strong with this one.
Just because the game designers made a good game doesn’t mean you can’t make it even better. Game modifications, or “mods” for short, are any alterations to a game that were not made by the game’s license holder. Some games are deliberately designed to be easy to modify, including a “construction set” of sorts to build levels, weapons, etc. However, some types of mods are discouraged, or even cracked down on, for good reason: a mod in the hands of a player but not their opponent usually means an unfair advantage. A few mods take advantage of content that was programmed into the game in the early stages, then scrapped from the final design. Unless space is a big issue, the programmers usually leave all this content Dummied Out in the game’s code. Game Shark allow determined amateur programmers to mod with the best of them.
Early ROM hacks were largely present in Famiclone consoles and cartridges, especially where the said system wasn’t officially released. Cartridges contained graphics hacks very often. The most common ones were those where the main character was replaced by Mario. Unfortunately, ROM hacks are probably the biggest offender of Sturgeon’s Law. As mentioned earlier, computer games are much easier to modify than console games.
See also House Rules and Self-Imposed Challenge. Here are examples of the popular modded games among the modding community. ZethN64’s Ura Zelda restoration project is a particularly infamous mod that never was completed. It was a mod Ocarina of Time that, despite its name, originally was supposed to just add a bunch of developmental elements back into the game, such as the fairy fountain and the Sky Temple. Super Metroid also has a randomizer. It’s gotten to the point where there’s been mods for mods for Garry’s Mod. Just about every mod for Gmod requires Wiremod, plus then there are the 4 Stargate addon packs, the Stargate addon pack by pyrospirit, Mckay’s Addon Pack, Carter’s Addon Pack, and SG-Mod, and then there’s the SBEP for Spacebuild.